1*297eecfbSDimitry Andric //===- Utils.h --------------------------------------------------*- C++ -*-===// 2*297eecfbSDimitry Andric // 3*297eecfbSDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*297eecfbSDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5*297eecfbSDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*297eecfbSDimitry Andric // 7*297eecfbSDimitry Andric //===----------------------------------------------------------------------===// 8*297eecfbSDimitry Andric 9*297eecfbSDimitry Andric #ifndef LLVM_DWARFLINKER_UTILS_H 10*297eecfbSDimitry Andric #define LLVM_DWARFLINKER_UTILS_H 11*297eecfbSDimitry Andric 12*297eecfbSDimitry Andric #include "llvm/ADT/SmallString.h" 13*297eecfbSDimitry Andric #include "llvm/ADT/Twine.h" 14*297eecfbSDimitry Andric #include "llvm/Support/Error.h" 15*297eecfbSDimitry Andric #include "llvm/Support/FileSystem.h" 16*297eecfbSDimitry Andric #include "llvm/Support/Path.h" 17*297eecfbSDimitry Andric 18*297eecfbSDimitry Andric namespace llvm { 19*297eecfbSDimitry Andric namespace dwarf_linker { 20*297eecfbSDimitry Andric 21*297eecfbSDimitry Andric /// This function calls \p Iteration() until it returns false. 22*297eecfbSDimitry Andric /// If number of iterations exceeds \p MaxCounter then an Error is returned. 23*297eecfbSDimitry Andric /// This function should be used for loops which assumed to have number of 24*297eecfbSDimitry Andric /// iterations significantly smaller than \p MaxCounter to avoid infinite 25*297eecfbSDimitry Andric /// looping in error cases. 26*297eecfbSDimitry Andric inline Error finiteLoop(function_ref<Expected<bool>()> Iteration, 27*297eecfbSDimitry Andric size_t MaxCounter = 100000) { 28*297eecfbSDimitry Andric size_t iterationsCounter = 0; 29*297eecfbSDimitry Andric while (iterationsCounter++ < MaxCounter) { 30*297eecfbSDimitry Andric Expected<bool> IterationResultOrError = Iteration(); 31*297eecfbSDimitry Andric if (!IterationResultOrError) 32*297eecfbSDimitry Andric return IterationResultOrError.takeError(); 33*297eecfbSDimitry Andric if (!IterationResultOrError.get()) 34*297eecfbSDimitry Andric return Error::success(); 35*297eecfbSDimitry Andric } 36*297eecfbSDimitry Andric return createStringError(std::errc::invalid_argument, "Infinite recursion"); 37*297eecfbSDimitry Andric } 38*297eecfbSDimitry Andric 39*297eecfbSDimitry Andric /// Make a best effort to guess the 40*297eecfbSDimitry Andric /// Xcode.app/Contents/Developer/Toolchains/ path from an SDK path. 41*297eecfbSDimitry Andric inline SmallString<128> guessToolchainBaseDir(StringRef SysRoot) { 42*297eecfbSDimitry Andric SmallString<128> Result; 43*297eecfbSDimitry Andric // Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk 44*297eecfbSDimitry Andric StringRef Base = sys::path::parent_path(SysRoot); 45*297eecfbSDimitry Andric if (sys::path::filename(Base) != "SDKs") 46*297eecfbSDimitry Andric return Result; 47*297eecfbSDimitry Andric Base = sys::path::parent_path(Base); 48*297eecfbSDimitry Andric Result = Base; 49*297eecfbSDimitry Andric Result += "/Toolchains"; 50*297eecfbSDimitry Andric return Result; 51*297eecfbSDimitry Andric } 52*297eecfbSDimitry Andric 53*297eecfbSDimitry Andric inline bool isPathAbsoluteOnWindowsOrPosix(const Twine &Path) { 54*297eecfbSDimitry Andric // Debug info can contain paths from any OS, not necessarily 55*297eecfbSDimitry Andric // an OS we're currently running on. Moreover different compilation units can 56*297eecfbSDimitry Andric // be compiled on different operating systems and linked together later. 57*297eecfbSDimitry Andric return sys::path::is_absolute(Path, sys::path::Style::posix) || 58*297eecfbSDimitry Andric sys::path::is_absolute(Path, sys::path::Style::windows); 59*297eecfbSDimitry Andric } 60*297eecfbSDimitry Andric 61*297eecfbSDimitry Andric } // end of namespace dwarf_linker 62*297eecfbSDimitry Andric } // end of namespace llvm 63*297eecfbSDimitry Andric 64*297eecfbSDimitry Andric #endif // LLVM_DWARFLINKER_UTILS_H 65